set terminal png
set output "3e08315d2c58bbae3ef499c5a7d807b5.png"
# original from TANAKA Masaki
# masaki@isea.is.titech.ac.jp(Tokyo Institute of technology)
set pm3d at s solid
set palette rgb 7,5,15 
unset colorbox 
unset surface
set ticslevel 0
set mapp cart
set size square
set view 45,30,1,1
set auto
set isosamples 100,100
compl(a,b)=a*{1,0}+b*{0,1}  
mand(z,a,n) = n<=0 || abs(z)>2 ? 1:mand(z*z+a,a,n-1)+1
splot [-2:1][-1.5:1.5] mand({0,0},compl(x,y),50) 

